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Mogilevtsev, D. ; Teo, Y.S. ; ?ehá?ek, Jaroslav ; Hradil, Zdenek ; Tiedau, J. ; Kruse, R. ; Harder, Georg ; Silberhorn, C. ; Sánchez Soto, Luis Lorenzo | IOP publishing ltd | 2017-09-13The physical nature of any quantum source guarantees the existence of an effective Hilbert space of finite dimension, the physical sector, in which its state is completely characterized with arbitrarily high accuracy. The extraction of this sect[...]texto impreso
?ehá?ek, Jaroslav ; Hradil, Zdenek ; Teo, Yong Siah ; Sánchez Soto, Luis Lorenzo ; Ng, Hui Khoon ; Chai, Jing Hao ; Englert, Berthold-Georg | American Physical Society | 2015-11Measuring incomplete sets of mutually unbiased bases constitutes a sensible approach to the tomography of high-dimensional quantum systems. The unbiased nature of these bases optimizes the uncertainty hypervolume. However, imposing unbiasedness [...]texto impreso
Aiello, Andrea ; Paúr, Martin ; Stoklasa, Bohumil ; Hradil, Zdenek ; ?ehá?ek, Jaroslav ; Sánchez Soto, Luis Lorenzo | The Optical Society (OSA) | 2020-09-15We report the first, to the best of our knowledge, observation of concentrating paraxial beams of light in a linear nondispersive medium. We have generated this intriguing class of light beams, recently predicted by one of us, in both one- and t[...]texto impreso
?ehá?ek, Jaroslav ; Hradil, Z. ; Koutny, D. ; Grover, J. ; Krzic, A. ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2018-07-03We construct optimal measurements, achieving the ultimate precision predicted by quantum theory, for the simultaneous estimation of centroid, separation, and relative intensities of two incoherent point sources using a linear optical system. We [...]texto impreso
Hradil, Zden?k ; ?ehá?ek, Jaroslav ; Sánchez Soto, Luis Lorenzo ; Englert, Berthold-Georg | Optical Society of America | 2019-11-14In recent proposals for achieving optical super-resolution, variants of the quantum Fisher information (QFI) quantify the attainable precision. We find that claims about a strong enhancement of the resolution resulting from coherence effects are[...]texto impreso
Donohue, J. M. ; Ansari, V. ; ?ehá?ek, Jaroslav ; Hradil, Zdenek ; Stoklasa, Bohumil ; Paúr, Martin ; Sánchez Soto, Luis Lorenzo ; Silberhorn, C. | American Physical Society | 2018-08-27By projecting onto complex optical mode profiles, it is possible to estimate arbitrarily small separations between objects with quantum-limited precision, free of uncertainty arising from overlapping intensity profiles. Here we extend these tech[...]texto impreso
Paúr, Martin ; Stoklasa, Bohumil ; Grover, Jai ; Krzoc, Andrej ; Sánchez Soto, Luis Lorenzo ; Hradil, Zdenek ; ?ehá?ek, Jaroslav | Optical Society of America | 2018-09-25It has been argued that, for a spatially invariant imaging system, the information one can gain about the separation of two incoherent point sources decays quadratically to zero with decreasing separation. The effect is termed Rayleigh's curse. [...]texto impreso
Harder, Georg ; Silberhorn, C. ; ?ehá?ek, Jaroslav ; Hradil, Z. ; Motka, L. ; Stoklasa, B. ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2014-10-07We report the experimental reconstruction of the statistical properties of an ultrafast pulsed type II parametric down-conversion source in a periodically poled potassium titanyl phosphate waveguide at telecom wavelengths, with almost perfect ph[...]texto impreso
?ehá?ek, Jaroslav ; Hradil, Zdenek ; Stoklasa, Bohumil ; Motka, Libor ; Sánchez Soto, Luis Lorenzo | Society of Photo-Optical Instrumentation Engineers (SPIE) | 2015Wavefront sensing is an advanced technology that enables the precise determination of the phase of a light field, a critical information for many applications, such as noncontact metrology, adaptive optics, and vision correction. Here, we reinte[...]
